Overlay video on white background at specific location

I would like to create a new video (2560 x 1440 px) that consists of a section of my current video (240 fps; 1280 x 720 px) on a white background. But, I want to put my current video at a certain spot within this new video (i.e., pixel location 100 x 100). Does anyone know how to do that?

I am currently using this script to extract the section of the video that I want:

vid1 = VideoReader(LeftVideo,'CurrentTime',TimeOffset_L);

for i=1:FramestoSave

img1 = readFrame(vid1);

imgt=[img1];

step(videoPlayer, imgt);%play video

writeVideo(outputVideo, imgt); %record new video

end

Answer 1

[Munish Raj]

Hello Jessica,

This can be done using MATLAB's matrix indexing.

You can create a 2560 x 1440 image, followed by writing the required pixels with the new pixels

bigVideo(0:100,0:100)=newVideo;

where newVideo is the frame of the overlayed video

This can be done in a for loop for every frame of both videos.

These individual frames can then be saved to a video.